ANSI/NISO Z39.50 (=ISO 23950: "Information Retrieval (Z39.50): Application Service Definition and Protocol Specification") specifies a client/server-based protocol for
searching and retrieving information from remote databases.
D. Gillman. Proceedings of Statistics Canada Symposium 2005, (2005)Symposium 2005 : Methodological Challenges for Future Information needs
Catalogue no. 11-522-XIE.